Technical Papers and Presentations

Here you will find presentations given at COMSOL Conferences around the globe. The presentations explore the innovative research and products designed by your peers using COMSOL Multiphysics. Research topics span a wide array of industries and application areas, including the electrical, mechanical, fluid, and chemical disciplines. Use the Quick Search to find presentations pertaining to your application area.

Numerical Modeling of a MEMS Sensor with Planar Coil for Magnetic Flux Density Measurements

J. Golebiowski[1], S. Milcarz[1]
[1] Department of Semiconductor and Optoelectronics Devices, Technical University of Lodz, Lodz, Poland

The silicon cantilever with the planar coil was applied to the magnetic flux density measurements. The influence of shape and dimensions of planar coil on magnetic energy density was described. In cause of magnetic anisotropy of analyzed silicon structure FEM method and couple field method was applied in simulation. The Lorentz force based sensors owing to their potentially simpler fabrication ...

Multiphysics Simulation of Isoelectric Point Separation of Proteins Using Non-Gel Microfluidic System

A. Contractor[1], N. Xue[2], J.B.Lee[2], A. Balasubramanian[1], and G. Hughes[1]
[1]Lynntech, Inc., College Station, Texas, USA
[2]Micro Nano Devices and Systems (MiNDS) Laboratory, Department of Electrical Engineering, University of Texas at Dallas, Texas, USA

A portable device that can identify protein and peptides real time in complex biological systems such as human bodily fluids reliably and accurately is in high demand to properly diagnose and treat medical conditions. Lynntech has developed an innovative Polydimethylsiloxane (PDMS) based microfluidics system with a unique design utilizing multi-channel inlets and outlets for isoelectric point ...

Wave Energy Converter through Piezoelectric Polymers

A. S. Zurkinden1, F. Campanile1, and L. Martinelli2
1Swiss Federal Institute of Technology (ETH), Zürich, Switzerland
2Università di Bologna, Bologna, Italy

This note addresses the concept of wave energy conversion by means of a piezoelectric material. The ocean surface waves represent an important source of energy. A multiphysics simulation is used to focus on different aspects, namely the free surface wave, the fluid-structure interaction, the mechanical energy input to the piezoelectric material and the electric power output, using an equivalent ...

The 3D Mixed-Dimensional Quench Model of a High Aspect Ratio High Temperature Superconducting Coated Conductor Tape

W.K. Chan[1,2], J. Schwartz[2], P. Masson[3], and C. Luongo[4]
[1]FAMU-FSU College of Engineering, Tallahassee, FL, USA
[2]North Carolina State University, Raleigh, NC, USA
[3]Advanced Magnet Lab, Palm Bay, FL, USA
[4]ITER Organization/Magnet Division, Saint Paul-lez-Durance, France

A successful development of an effective quench detection and protection method for a high temperature superconducting (HTS) coil based on a HTS coated conductor tape lays on a thorough understanding of its slowly propagating, three-dimension (3D) quench behavior. Toward this goal, a 3D micrometer scale finite element (FE) thermo-magnetostatic HTS tape model is developed and implemented in ...

Deposition of Aerosol Particles in Electronic Devices

M. Olin [1], L. Laakso [1], J. Hannula [2], T. Galkin [2], and K. Väkeväinen [2]
[1] University of Helsinki, Finland
[2] Nokia Corporation, Finland

Small electronic devices are nowadays used in varying conditions, which expose them to stresses. One part of this stress is related to transport of potentially harmful chemical substances into small mechanical structures of devices, which happens by molecular diffusion and advection by air flow. We have applied a simplified contamination model, whose parameters, though, are estimated by ...

Numerical Investigation of Electroosmotic Flow in Convergent Divergent Micronozzle

V. Gnanaraj[1], V. Mohan[1], and B. Vellaikannan[1]
[1]Thiagarajar College of Engineering, Madurai, Tamilnadu, India

A fundamental understanding of the transport phenomena in microfluidic channels is critical for systematic design and precise control of such miniaturized devices towards the integration and automation of Lab-on- a-chip devices. Electroosmotic flow is widely used to transport and mix fluids in microfluidic systems. Electroosmotic transport in convergent divergent micronozzle is significant in ...

Design of High Performance Condenser Microphone Using Porous Silicon

S. Suganthi[1], M. Anandraj[2], and L. Sujatha[1]
[1]Department of Electronics & Communication Engineering, Rajalakshmi Engineering College, Chennai, India
[2]Department of Physics, Rajalakshmi Engineering College, Chennai, India

Porous Silicon (PS) can easily be formed by electrochemical etching of silicon in HF based electrolytes at room temperature. Since, PS is compatible with silicon IC technology; it finds lot of applications in the fabrication of MEMS devices. In the current study, we discuss the design of a condenser microphone using a Silicon/ Porous Silicon composite membrane as a movable plate. The performance ...

Optical Manipulation of Microscopic Objects

R. Ozawa
Yokohama University

In recent years, optical manipulation using optical radiation pressure has been widely studied. In this study, the radiation pressure exerted on various kinds of microscopic objects with different laser beams was evaluated by COMSOL Multiphysics software. By changing beam shapes, microscopic objects can be trapped and rotated. This paper is in Japanese.

Mobility of Catalytic Self-Propelled Nanorods Modeling with COMSOL Multiphysics®

F. Lugli[1] and F. Zerbetto[1]
[1]Department of Chemistry “G. Ciamician”, Università di Bologna, Bologna, Italy

A small particle or a nano-sized object placed in a liquid is subject to random collisions with solvent molecules. The resulting erratic movement of the object is known as Brownian motion, which, in nature, cannot be used to any practical advantage both in natural systems (such as biomolecular motors) or by artificial devices. If energy is supplied by external source or by chemical reactions, ...

Combined Analytical and Numerical Modeling of a Resonant MEMS Sensor for Viscosity and Mass Density Measurements

S. Cerimovic[1], R. Beigelbeck[2], H. Antlinger[3], J. Schalko[2], B. Jakoby[3], and F. Keplinger[1]
[1]Institute of Sensor and Actuator Systems, Vienna University of Technology, Vienna, Austria
[2]Institute for Integrated Sensor Systems, Austrian Academy of Sciences, Wiener Neustadt, Austria
[3]Institute for Microelectronics and Microsensors, Johannes Kepler University Linz, Linz, Austria

A resonant MEMS sensor for viscosity and mass density measurements of liquids was modeled. The device is based on Lorentz-force excitation and features an integrated piezoresistive readout. The core sensing element is a rectangular vibrating plate suspended by four beam springs. The liquid surrounding the plate influences the resonant behavior of the system. Thus, evaluating the properties of ...

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